...question "How do I build my own Forth?" come up) that...an explanation of the tethered Forth approach to embedded systems development...late 90's, and both FORTH, Inc. and MPE have been...inner interpreter required to run forth words on the target. Indisputably...I envision an environment where Forth words are quick interactively developed...machine and is written in pic assembly for the 16F family...

Jeff. ... interactivity and incremental compilation. For years I've used Pic assembly language... May be you want to take a look at amforth: http://amforth.sourceforge.net/ Its ... done by Matthias Trute for atmels ATmega familiy and it is free. Mayby you can use it for pics too. Just redefine those few forth code words of the kernel along with your i/O. As you say: "Make it work, ...

...necessarily minimal. Maybe I should stop complaining because I have my own bytecode interpreter that has about 35 instructions. I factored the ... complements of one another so you really only need NAND to build both (and ^ too IIRC). && and || are buildable from comparison and...http://www.ioccc.org/1992/buzzard.2.design which develops a small Forth system from 15 primitives. Gerry

... seperate ... once you have execute code in flash, download data, and store data to flash, you can build the balance of the umbilical development system from there. The only problem I see is that since ... here. As noted above, this need not go through the BAY, it can be output by the PIC directly * read off the data in the BAY, starting with the BAY length counter. Do you mean...

....com>, Elizabeth D Rather <eratherXXX@forth.com> wrote: ... You are handcuffed ... that can programmatically program their own flash. There's more than ... Harvard architecture part of the PIC. The Harvard architecture also dictates ...concept of indirect-threaded code Forth. Other models work differently, and...glossing over the difficulties of building one. A token-based executive...

... I missed explaining something. Code isn't going into RAM. The code is burned into the flash of the PIC. There's 4-8K of flash on a typical 16F part now. And the only parts I'll even consider are ones that can programmatically program their own flash. Remember that a typical code definition will be two to seven words long ... sometimes longer, but even then ...

...news.supernews.com>, Elizabeth D Rather <eratherXXX@forth.com> wrote: none Byron Jeff wrote: ...s a little more accessible than that. PIC doesn't seem to support ram ...to figure out how in the heck forth compiles a number into a definition. ...It'll have to be inlined. Many Forths synthesize the second stack, be it the... bit DOS applications http://home.hccnet.nl/j.j.haak/forth.html

...a Steven. The problem with PICs for Forth is that the early ones are based on a 1970s...the standard tools does not make PICs a very attractive target, especially ... and storecode. Implementing an Umbilical Forth this minimalist way may lead ... There were about three Rochester Forth conference papers on the topic ... NEXT. In short create enough Forth to execute the inner interpreter ...

...supernews.com>, Elizabeth D Rather <eratherXXX@forth.com> wrote: none Byron Jeff wrote...>>> just that with the PIC based forths I've seen so far... an assembly environment. But with Forth specifically designed around making calls, ... simplest foolproof tools I can build then using them to bootstrap ... cross compiler? Yes. ... A classic Forth has a text interpreter, which ...

....supernews.com>, Elizabeth D Rather <eratherXXX@forth.com> wrote: none Byron Jeff wrote:...docs now, email me erather {at} forth {dot} com) I'll take a.... New links are: http://www.forth.com/downloads/ANS/XCtext5.doc (...XCtext5.pdf two formats) http://www.forth.com/downloads/ANS/XCapp5.doc (...XCapp5.pdf two formats) http://www.forth.com/downloads/ANS/XCpaper.pdf (...